@Gixcaririxen: Many UE4 games are using custom materials, different from default layouts in UE. Umodel can parse material properties, but doesn't know how to apply them and using default schemes. If it looks weird, that means the game is using such custom materials and they can be re-created properly only in third-party software (like blender) - manually, with the help of material properties provided by umodel, they're displayed on your last screenshot and also available upon export of a model in a separate txt.
Implementing those changes in umodel would mean workaround for every other game, which obviously will never happen. Unless Gildor will invent AI for this matter